 The leader of the papal contingent was a Norman by the name of William of Montreuil.The leader of the Spaniards was Sancho Ramírez, King of Aragón and Navarre, whose realm was greatly threatened by the Moors to the south.The largest component, the Aquitainian, was led by Duke William VIII of Aquitaine (known as Guy-Geoffrey), whom one historian calls the "Christian generalissimo".